def add(a, b):
    print("ADDING %d + %d" % (a, b))
    return a + b

def substract(a, b):
    print("SUBSTRACTING %d - %d" % (a, b))
    return a - b

def multiply(a, b):
    print("MULTIPLYING %d * %d" % (a, b))
    return a * b

def divide(a, b):
    print("DIVIDING %d / %d" % (a, b))
    return a / b

print("Let's do some match with just functions!")

age = add(30, 5)
height = substract(78, 4)
weight = multiply(90, 2)
iq = divide(100, 2)

print("Age: %d, Height: %d, Weight: %d, IQ:%d" % 
        (age, height,weight, iq))


# A puzzle for the extra credit, type it in anyway.
print("Here is a puzzle.")

what = add(age, 
            substract(height, 
                      multiply(weight, divide(iq, 2))))

print("That becomes: ", what, "Can you do it by hard?")